Your @ucsd.edu Google calendar is shared by default to all users in the @ucsd.edu Google domain, showing your free/busy information. If you want your default calendar permissions to be something different, you can go into your Google Calendar Settings (gear icon upper right corner) and adjust any number of settings regarding your account.
Sharing primary or secondary calendars: you will need to reshare your @ucsd.edu calendar: https://support.google.com/calendar/answer/37082
If you are sharing out your @eng calendar to others (primary or secondary), you may want to unshare the @eng calendar so folks don't continue to look at it for your availability: Stop sharing your calendar
Access to others' calendars: they will need to share their calendar with your @ucsd.edu Google account
Resource Calendars such as conference rooms: permissions may also need to be remapped on those calendars - please contact OEC for further assistance.
Calendar Settings that do not migrate: will need to reconfigure
Out-Of-Office events - these will copy over, but will be converted to all-day events
Pre-existing events you have been invited to: updates to the event after the migration will not reflect on migrated events
You may want to ask the original invitee to reinvite your @ucsd.edu Google calendar
Pre-existing events that you have invited others to: there may be issues if you make updates to the calendar appointment because your @ucsd.edu account is not the original creator
There is a way to transfer ownership of an individual event
You may want to delete and recreate the event, if there are changes to be made
In order to also delete the event from your invitees' calendars, you will want to go back into your archive @eng account and delete the calendar event from the @eng calendar
Recurring events where individual events have been rescheduled
If you created the recurring event, you will want to delete the series and recreate it
If someone else owns the recurring event, you will want to ask the owner to reinvite your @ucsd.edu Google calendar
Calendar attachments
calendar attachments do not copy over, this may include the Meeting Notes. If the file was attached from Drive, then the file still exists in Drive. Your Meeting Notes are still attached to the old calendar event in your archive @eng account, so you can go there to find the meeting notes and copy them over as necessary.
Add-ons and Integrations for Calendar will need to be re-enabled on new calendar
Zoom Add-On needs to be installed and re-enabled in new account
If you have linked your Google calendar to your Zoom Profile, you will need to disconnect from the old calendar, and connect to the new calendar